Alright my grow room is in an attic...and daily temps with a heater are good...but when the lights go off the temps drop from around 75 to around 40.....and i havent used a heater at night... but my question is? i have blankets closing off the room from the outside air...and they dont seem to hold out the coldness..Is there anything else i can use and put up to make it a little warmer in there...I just need some help with some warming techniques or things to do??? thanks